Hawaii Five-O (season 10)

An Irish terrorist (Stephen Boyd) poses as a priest in order to buy bombs and weapons in Hawaii for use in his home country.

McGarrett teams with a Navy commander (Mark Lenard) to search for a cargo ship hijacked by armed and dangerous men.

When a magazine reporter (Jean Simmons) writes a story about Five-O, McGarrett tries to discreetly locate two missing children.

Rookie cop Joey Kalima (John Rubinstein) is framed for departmental corruption by a group attempting to rob a bank.

A mysterious intruder kills two members of an archaeological dig that is attempting to find a king's burial site.

A recovering alcoholic ex-cop (Gil Gerard) puts his life in danger after he returns to Hawaii to make amends to McGarrett.

A Soviet tennis star is caught up in a murder after she decides to defect to be with her American boyfriend (Tim Matheson).

A Soviet spy ring led by a femme fatale (Maud Adams) kidnaps an engineer on a nuclear sub and steals classified data.

After an Asian diplomat drowns in a pool, his wife is convinced forces from their home country are responsible.

The Governor asks a reluctant McGarrett to investigate the kidnapping of a racist shipping-magnate's daughter.

A physician is shot to death on a remote island and a young doctor from a local clinic is the prime suspect.

McGarrett must leave to handle family business during the investigation of a union candidate's murder.

A Congressman (David Birney) cheats on his wife while judging a beauty contest, and is blackmailed by a dangerous man (Soon-Tek Oh).

McGarrett teams with an FBI agent (George Grizzard) after the syndicate sends a hit man to kill an organized-crime informant.

After one of Five-O's undercover men is shot in the back, McGarrett enlists a Maui Policewoman's (Carol Lynley) help.

A young man seeks revenge on a Hawaiian manufacturer who once tortured his father in a Japanese prison camp.

The heirs to a wealthy murdered artist are now falling victim to lethal booby traps set in their prized possessions.

Five-O is summoned after a mystery writer (Mildred Natwick) investigates a fraudulent, and murderous, cryogenics outfit.

After the owner of a horse farm's body is found burning in a cane field, his widow becomes a prime suspect.

Guest stars: Andrew Prine and John Hillerman (the only one of the subsequent stars of Magnum, P.I. to appear on this series).

When the Five-O team suffers a devastating loss with its close-knit ranks, an enraged McGarrett asks a Hawaiian organized crime boss for help.